sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

1. Updated function headers for all assembly function

Browse Source 
2. Optimized register usage in SetMemXX functions in all lib instances
3. Fixed a logical error in CopyMem for all lib instances


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1139 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-07-28 07:28:19 +00:00
parent 27169a56e6
commit eb227e96bd
106 changed files with 1006 additions and 457 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.S
View File

@@ -21,32 +21,29 @@
#
#------------------------------------------------------------------------------
.686:
#.MODEL flat,C
.xmm:
.code:
.global _InternalMemCopyMem
#------------------------------------------------------------------------------
# VOID *
# _mem_CopyMem (
# EFIAPI
# InternalMemCopyMem (
# IN VOID *Destination,
# IN VOID *Source,
# IN UINTN Count
# )
# );
#------------------------------------------------------------------------------
.global _InternalMemCopyMem
_InternalMemCopyMem:
push %esi
push %edi
movl 16(%esp), %esi # esi <- Source
movl 12(%esp), %edi # edi <- Destination
movl 20(%esp), %edx # edx <- Count
leal -1(%edi,%edx,), %eax # eax <- End of Destination
leal -1(%esi,%edx,), %eax # eax <- End of Source
cmpl %edi, %esi
jae L0
cmpl %esi, %eax # Overlapped?
cmpl %edi, %eax # Overlapped?
jae @CopyBackward # Copy backward if overlapped
L0:
L0:
xorl %ecx, %ecx
subl %edi, %ecx
andl $15, %ecx # ecx + edi aligns on 16-byte boundary
@@ -56,16 +53,16 @@ L0:
subl %ecx, %edx # edx <- remaining bytes to copy
rep
movsb
L1:
L1:
movl %edx, %ecx
andl $15, %edx
shrl $4, %ecx # ecx <- # of DQwords to copy
jz @CopyBytes
addl $-16, %esp
movdqu %xmm0, (%esp)
L2:
L2:
movdqu (%esi), %xmm0
movntdq %xmm0, (%edi)
movntdq %xmm0, (%edi)
addl $16, %esi
addl $16, %edi
loop L2
@@ -73,11 +70,11 @@ L2:
movdqu (%esp),%xmm0
addl $16, %esp # stack cleanup
jmp @CopyBytes
@CopyBackward:
movl %eax, %edi # edi <- Last byte in Destination
leal -1(%esi,%edx,), %esi # esi <- Last byte in Source
@CopyBackward:
movl %eax, %esi # esi <- Last byte in Source
leal -1(%edi,%edx,), %edi # edi <- Last byte in Destination
std
@CopyBytes:
@CopyBytes:
movl %edx, %ecx
rep
movsb